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Import Emails & Folders from Outlook Express

I am using Outlook Express v6 with Windows XP. I am looking to switch to another computer that uses Windows 7. As OE will not work with W-7, I am looking for a new email client.
1) Can I import my OE emails/files and folders into Zimbra? (note: these are .dbx files).
2) If yes, how can I do this?
--thanks--